[GAMEPLAY] Yi's Alpha Strike not making Yi untargetable

Hi, Yi is one of my favourite, if not the favourite champion in league and I play him a lot. In last few months (i think it's since start of preseason 6), Yi's Q is not doing what it should. He is sometimes very dependant on using his Q properly (to avoid spell that does lot of dmg, to avoid being CCd, ...). And with this bug, I really can't make any shiny plays (sorry, it's Yi -> "plays") beacause of this bug. So basically, this bug makes sometimes make me targetable while in Q. To give an example, today I played against fed graves, so it was important to dodge his Q (or R). I timed it perfectly, so that i would be untergetable while Graves' Q comes back. But I still took (a lot of) damage from that Q and died because of it. Even my teammates said that I was in Q and his Q shouldn't have hit me. In the end of the game, I died while attempting to backdoor their inhibs and Nexus. And again, I took damage from Ekko's Q while it was coming back to him. Also, Ahri's often seems to ignore my untargetabilty and charms me anyway. I was thinking that maybe those Qs are timed badly, but in lot of games, when this situation happens, my teammates say that it is bugged. I saw many Alpha Strike bug reports on these boards and some of them are 12 months old, maybe older. You really should do something with it.

Thanks